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Acta Prataculturae Sinica ›› 2015, Vol. 24 ›› Issue (11): 91-99.DOI: 10.11686/cyxb2014289

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Population parameters of two pea aphid (Acyrthosiphon pisum) color morphs at different temperatures

DU Jun-Li1, 2, WU De-Gong2, LV Ning1, LIU Chang-Zhong1, *   

  1. 1.College of Grassland Science, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem of Education Ministry, Grassland Engineering Laboratory of Gansu Province, Lanzhou 730070, China; 2.Agricultural College, Anhui Science and Technology University, Fengyang 233100, China
  • Received:2014-06-19 Online:2015-11-20 Published:2015-11-20

Abstract: In order to clarify the effects of temperature on the population dynamics of the red and green color morphs of pea aphid (Acyrthosiphon pisum), the development, reproduction, and life cycle of these two pea aphid color morphs were studied at six constant temperatures ranging from 12 to 32℃. Neither of the two pea aphid color morphs could develop to adulthood at 32℃. The net reproduction rate (R0), and intrinsic rate of increase (rm) of the two color morphs of pea aphid increased with increase in temperature over a range from 12 to 20℃, and the R0 of the red color morph was numerically higher than that of the green color morph over this range, and significantly higher at 16 and 20℃ (P<0.05). At 24℃, the R0 of the red color morph was significantly lower than for the same color morph at 16 and 20℃ (P<0.05), and the R0 of green color morph was significantly higher than for the same color morph at 12-20℃ (P<0.05), and significantly higher than the R0 of red color morph at 24℃ (P<0.05). At 28℃, the R0 values of the two color morphs were both significantly lower than for the same color morph at 12-24℃ (P<0.05). The rm of two color morphs increased with increasing temperature over the range 12 to 24℃, and there were no differences in rm between red and green colour morphs over this range of temperatures (P>0.05). At 28℃, the rm of the red color morph was significantly lower than the green color morph (P<0.05). Hence the red color morph was found to be better adapted to lower temperature, and the green color morph better adapted to higher temperature.